Door-operating mechanism



Odi. 9, 1928. 1,686,851

c. w. GORMAN DOOR OPERATING MECHANISM 'Filed April 2, 15525 2 Sheets-sheet 1,

Oct. 9, 1928.

. f 1,686,851 c. w. GORMAN DOGR OPERATING MECHANI SM `Filed. April 2, 1925 2 Sheets-Shet 2 :F1 En..

@Hor/wup relation of Patented Oct. 9, 1928.

PATENT OFFICE.

CHRLES W. (rORllllA1\T, -OF MUSKOGEE, OKLAHOMA.

noon-.OPERATING MECHANISM.

Y Application filed April 2, 1925.` Serial No. 20,255.

This application' forms a continuation in part of my U. S. application, Serial No. 647,689, filed June`25, 1923, and allowed Sep'- tember 25, 1924.

, Like the original application, the invention relates to electrical mechanisms for opening and closing doors, and has for itsprincipal object to provide an exceptionally simple and inexpensive, yet a highly "eiiicient andreliable arrangement of parts :t'or 'both opening and closing a door at the willof the operator. An object of the improved construction shown by the present-application, is to greatly simplify the subject matter ldisclosed in the first application and provide amore compact parts which may be more easily installed. o. i Y i A further aim lis to provide unique motorcontrolling means designed primarily for but not! necessarily restricted 'to use in connect-ion with a door-operating mechanism.

With the'toregoing and minor objects 1n view, the invention resides in the novel subject matter hereinafter described and claimed, the description being'suppleinented by the acl companying drawings.

Figure 1 is a top plan v iew'o'f a door operating mechanism constructed in accordance f with my invention, showing it in operative relation with a portion of a sliding door.

` lFigurei2fis aside elevation ot lthe yparts shown -in Fig. `1, parts'being broken' away and in, section. f

y Figures 3 `.and 4 are vertical yttz'tn'sverse'secs 'tional views 'as indicatedby lines 3f-3 and 4 4 of Fig. `1. .i

In `the drawings' above yj'brietly described, illustrating theV preferred form oit construction, the numeral 1 Ydesignates a basev which is 'adapted to be mounte'd'va't any convenient location with respect to a kdoor 2, to be opened iand closed. Ifthisdoor be slidably mounted,

as inthe presentdisclosure, the base 1 will be mounted adjacent one upper corner of the doorway. o i

Mounted upon the base 1, is a reversible electric motor-3, whichby means of a belt or the like 4, drives alarge pulleyf on a shaft 6,

` said Vshaft being mounted inl appropriate bearings 7 risingt'romthe base 1. On one end of 'thissliaia I khave showna sprocket wheel '8' around which an'endless sprocketlchain 9 is 'trained,said chain being also passed around a `guide"w'heel-or sprocket 10 disposed at any desired orja'ppro'pria'te location.A AThe lower reach ofthe chain 9 passes slidably through-a ,may well be in the form oit a short length of rod, as shown.

An'elongated screw 14, is rotatably mounted inappropriate bearings 15 'carried `by -the base l, said screw being driven by beveled gears 16, 'from theV shaft 6. This screw is threaded through a traveling body 17 'and it acts Lto shift said body gradually from one end to the other end of the screw, when the door is either opening'or closing.A This body is'provided with a guide18 having an eye through which an operating rod 19 vvfora motorereversing switch 20, passes slidably., saidrod being parallel with the screw and having trip-'collars 21 spaced apart along 'the length of said screw. Preferably, cushioning springs 22 surround the rod and engage the yinn'ersidesot the collars '21. lVhen the body 17 is at one endiof the screw, it engages one of the trip-.springs 22 and shifts the rod 19 Vto set the reversing switch 2O at one of its 'two operative positions, whiletravel of said body to theother end of the screw, causes it to engage the other trip spring 22 and shift the rod 19 to set theswitch 20 'at its other operative position. i

vIn vthe present disclosure, theswitch 20 is mountedadjacent one end of the vscrew 14, and said switch includes six stationary contacts 23,24, 25, 26, 27 and 28. To the contacts 27 YVand 28, disposed centrally of the `switch base, double-throw switch blades 29 and 30 are pivoted, these blades-being appropriately connected with one end of the rod 19, to be operated by the latter. Wires 31 and`32'connect the contacts 23 and 24 with two terminals of the motor 3, another wire '33 is shown leading from the contact 28to another terminal of the motor, and leading to the contact 27 is one of the main current supply' wires 34. The other main current conduct-ingwire 35, leads to a cont-act strip or track 36 carried by an insulating base 37 which is inset in or otherwise suitably se- Y cured to the base 1. `Parallel with the track 36, is another track formed of relativelyfadjustable strips or sections 38 and 39 carried by the base 37, one of these strips vbeing connected to a wire having a branch 41 leading to one terminal of the motor 3; By means of one or more push button switches or similar Vswitches 42, the wire 40 may be electrically connected witha Vwire 43 which branches Yfrom the wire 35. At least .onenof the switches 42 is located, at the outside of the door 2 and at least oneV at the inside thereof, and when either of these switches is closed, current is supplied tothe motor 3 toeither open or close the door, as the case may be. Assoon as'the doorhas moved to a slight extent, a traveling contact 44 carried by the body 17 bridges the gap between the contact tracks 36 and 38e-39, so that the switchv 42 previously closed, may be released and allowed to fopen. rlllien, the trackage4 and the traveling contact shoe'serve to supply current to the motor through the switch 20,

` so that the movemen-tof thejrdoor continues.

By the time the door has almost'reached the limit of its movement, the contact 44 disen- V gages the track v384-39' andthus the current to the motor 3 is broken. -The momentum of l the parts however is sufficient to leffect feeding of the' body 17 along the screw 14, until it engages the-trip 22, shifts the rod v19, and reverses theposition of the switch 20. All parts nowsta iid idle, until one of the switches 42 is again closed. vWhen this isdonefhow` ever, current Ais supplied to the motor 3 and tlierlatter is driven in the reverse direction fromv that in which it previously moved, due to the different Vsetting of the .reversing switch. 20. The result isthat the door is moved Vin the opposite direction by the'inotor, until the contact 44 clears the track' 38.-39.

immediately after this, the membefr18 en.

gages one ofthe trips on the ,rod 19, thus shifting the latter and again setting the motor-reversing switch 20.

1n the preferred form of construction, the

Y bearings forthe movable parts are carried by'a metal platef45which is secured upon the base 1 but is providedvwith an opening 45 receiving the insulating'base 37. The

. stationaryk contact trackage 36`3839is preferably mounted onthis base 37 in the manner shown. The track `or strip 36 is frictionally held in a longitudinal groove 46 in the base 37, and similar grooves 47 and 48 are provided for the strips l38, and 39, said rstrips 38 and 39 being of less length than their receiving grooves, so that theymay be longitudinally adjustedftherein as occasion may demand, so as to control'the Vtime at which the traveling contact 44 will disengagefroin operative relatioii'with the fstationary Contact trackage. r1`he strips 38 and 39 frictionally engage thewalls of their receiving grooves 47 and 48 and are by this frictional engagement, held in adjusted position. Y At no time, are the strips adjusted sucien'tly to bringtheir overlapping inner' ends out of electr-icalcontact with each other.

The traveling contact-44 may be mounted in' any desired manner.V For illustrative purposes, I have shown itslidably received in an open-bottomed metal casing 49, secured by screws 5() to an-insulating block 51 whichV is in turnl securedby screws 52 to the lower end of .the body 17.` Coiled' compression springs 53 have been shown acting vagainst,

Currentl travels through wire 35l to staf tionary contact strip yor track 36 into travel-l ing Contact 44 which when moved afsliort ways makes contact with stationary contact strips or tracks 38-39 or completes the connection between contact strips or tracks 36 and 384-39V through wire 40 through wire 41 intomotor 3,-

it will be noted thatone side of circuit vhas been completed to motor. Wire 34 leads toV stationary contact 27 on switch 2O through switch blade 29 to contact 25 .across switch 20 to contact 23 through wire 31 into motor,

this makes the other'side of circuitcomplete;V

n Note thatwith the switch in this position,

Figures land 2, motoreld coil wire 32con-V` nects to wire 33 through contact 24 across switch 2O .to contact 26 through switch blade 30 to Contact 28. This connection remains the same until traveling Contact 44 has passed off of stationary contact 38. :Then the electric connection or main feed line has been broken which causes the motor to stop. Immediately after the contact is broken the reversing switchis thrownin the opposite positi'onby shifting lever 19'.v Y Y Now the motor starting coilwire has been changed so that motor will run in the 'opposite direction. That isin this position cur` rent kfrom wire 34 connected to contact 27 through switch blade 29to contact 24 through wire 32 into motor, v*wirel 31 isjconnected to, wire 33 through contact 23. through switch V blade3() .to contact 28, mechanism is started A by closing contacts v42 whichv completes the circuit'betweenst'ationary contacts 3 6 and 38-39 and causes the machine-to run, after contact 44 has traveled a short wayit Coml pletes the circ-uit between stationary contacts 36and 38-39.Y The operator then releases contacts 42 andthe mechanismtakes care of itself.

ANote that Ywhenthe mechanism is in the Apo-v Ysition'of Figures 1 and 2 that the only place Vthat electric .connection Ais broken is between the contact tracks 36 and 38-39 To set the mechanism in motion, close any one of'con- Y tacts 42 and the circuit is completed. VAfter Ytraveling contact 44 has moved a short way it takes the place of contacts 42 or completes f the circuit between contacts 36 and 38-39,

and keeps the mechanism running until traveling contact 44 runs ofi' of stationary contact 38. Then the connection is again broken and motor stops a short dista-nce afterwards. f

Both of these operations are positive and the same except for the position of the reversing switch which changes eaoh ,time from one to the other so as'to make the motor run in one direction one time and the opposite direction the next time. v

It will be seen from the foregoing that simple yet effective provision has been made for carrying out the objects of the invention, and while the details disclosed are preferably followed, it is to be understood that within the scope of the invention as claimed, numerous modiiications may be made.

I claim 4 A mechanism of the class described comrisinfr a base a reversible electric motor base and operatively connectedl with said motor, a. reversing 'switch for the motor mounted on the base, an operating member for said reversing swit-ch having trips at points spaced apart along said screw, and a non-rotatable body engaged with said screw, said body having a. portion received between said trips to engage the same and shift said Aoperating member to actuate the reversing switch; together with additional current controlling means for the motor comprising contact trackage mounted on the base parallel with thescrew, and a. traveling contact engaging said trackage and carried by said body, said traveling contact being adapted to move from operative engagement with said trackage to break the motor circuit, said contact trackage comprising a contact strip and a track parallel therewith formed of overlapping longitudinal adjustable strips.

In testimony whereof I have hereunto afiXed my signature.

CHARLES W. GORMAN. 

